INPUT LEDGER
What is known, entered, or assumed.
| Input | Value | Origin |
|---|---|---|
| Current salary | $100,000 | User scenario |
| Current rent / other spending | $2,100 / $2,000 monthly | User scenario |
| Destination salary | $125,000 | User scenario |
| Destination rent / other spending | $3,200 / $2,200 monthly | User scenario |
REPRODUCIBLE CALCULATION
Follow the intermediate result.
Current pre-tax room
Formula or rule: $100,000 ÷ 12 − $2,100 − $2,000
Result: About $4,233 per month
Destination pre-tax room
Formula or rule: $125,000 ÷ 12 − $3,200 − $2,200
Result: About $5,017 per month
Headline monthly raise
Formula or rule: $25,000 ÷ 12
Result: About $2,083
Pre-tax room gained
Formula or rule: $5,017 − $4,233
Result: About $784 per month
DECISION READING
What the result means.
More than half of the headline monthly raise is absorbed by the entered rent and spending difference before federal, FICA, state, local, benefit, or insurance effects are calculated.
SENSITIVITY
What could change the answer.
- A $300 rent error changes the monthly result by exactly $300.
- Filing status, benefits, and state or local tax can materially change take-home pay.
- Childcare, commuting, and health costs should be added as explicit household inputs.
BOUNDARIES
What this case does not prove.
- This case is a pre-tax screen, not a take-home-pay result.
- The salaries and costs are illustrative and are not market averages.
- It does not assess job stability, schools, health care, or quality of life.
OFFICIAL SOURCES
Where factual context is verified.
RELATED MOVE CASES
Change one assumption and compare again.
Each case keeps inputs, arithmetic, evidence, and uncertainty in separate layers.